Ciera and Bethany save money using savings accounts opened on the same day. Both deposit $20 to start and an
additional $15 each week. The graph represents the total
amount, y, in each savings account after x weeks. Describe
the number of solutions modeled in the graph and what it
means for the situation. How can you change the situation
so that the graphs model a different number of solutions?
Explain your reasoning.
Savings ($)
у
100
90
Clera
80
70
60
Bethany
50
40
30
20
10
0 1 2 3 4 5 6
Time (weeks)
SOLUTION